Germany had the big hyperinflation in the early 20's. Maybe if you could make some copies of the bills from back then, with all the zeros.

Also I know there were some local bills too - since transport, of the huge amount of paper money began to be a problem, I believe the central authorities allowed lots of smaller cities/towns to print the money. I've seen some bills from that era, that were from small cities in Germany/Austria. Would be great if you could find that, for whatever area you're teaching in.

Maybe talk about Beanie Babies, and bring one in. They were a huge fad, jumped in value, then more and more were manufactured so they weren't scarce anymore, and the whole thing faded.